Automatic firearm



June 5, 1923.

. ,l,457;477f F. WALTHER ET AL AUTOMATIC FIREARM FiledAug. 29. 1921 4 sheetssheet 1 Jun 5; 19243.

1,457,477 F. WALTHER ET AL i AUTOMATIC FIREARM Filed Aug. 29 1921 4 Shoets-$heet 2 'Julie 5, 1923. 1,457,477

` F. wAlfTHER r-:T AL.

AUTOMATIC FIREARM Filed Aug'. 29, 1921 4 sheets-sheet s June 5, 1923.` 1.457.471

lF. wALTHER ET AL.

AUTOMATIC FIREARM' Filed Aug. 29. 1921 4 ShntsQSheet 4 MAW: JV d M 2,441,

member fste toggle-joint 3, 4 during the? return of' the breech slide B andofthe movable barrel 1 to the firin position, and thusk to bring about'the ben g of the toggle` 5 oint and therefore the opening of the breech block the rear tog le lever 4 is provided with `a cam which, on the renewed advance of the breech slide B, finds an` abutment on va spring-controlled arm mounted in the re-` ceiver'A of the gun, and thus bends.. the to lie-'oint and pulls back the breech block 't e cam again passes out of reach of the s ring-r'sontrolled army 'during the renews advance of the breech slide and barrel, and the toggle-joint isgexposed to the actlliof `the recoil s ring, and therefore ad- ,.vahcesfthe breech b ook. In `the described manner the l'bending of the tog le-joint dur-l reech block. 80 brings about the ejection ofthe cartridgel the i withdrawmg of the A .is laterally voted in a groove or recess 66 an arm 65 w ch,`by the action of a springy a 67, is forced to project from said wall. When the slideB is moving back on thel receiver A the spring controlled arm 65 is first forced into thawall by the .cam 64 and then when the slide B arrives nearly at the end of its 4v,rearward movement and when the cam 64 hasl r d beyond the sprin foontrolled arm "the said spring-contro ed arm 65 is forced out of the receiver A (Figs. 4 to 6) through the action of a cam face 68 on the slide. The spring-controlled arm is further subjectlto the action of an oblique or cam e 69 `of a short end 70 of a bifurcated P35171 is controlled by the barrel advanceispring 72.` The toggle-joint is ex- Y, posed to the action of the recoil spring .73 k which Vp'rees. the pressure in or rod 74 against a pin of the togg e lever 4 and thus produces a stretching of the togglei0i1,1t,.. 1W f Y Th'isoperation of the parts is as follows On a shot being fired, the slide B' with the barrel' 1 recoils, `thebarrel return s ring 72 being compressed.' By means o the strjet'chedy toggle-joint 3,14 which recoilsvalso,

- 'thegeccils ring 73 is alsocompressed, that el breech block remains closed..

is to Asay vDuring the recoil of the 4slide B, the cam 64 passesthe `spring-controlled arm 65. After thishas taken place, the cam face 68 of thev slide `B force forward the spring-controlled arm 65,-.so that it will be brought` of the cam 64. Thev recoil of the slide B is now completed.V The slide'B is provided with a stop 53 which strikes against a vstop 56 on the receiverA. The barrel return spring 72 can now a ain become operative, andyitwill move` orward the breech slide B with the barrel 1. The cam64 of the toggle joint 3, 4 now strikes against the spring-controlled arm 65, so that the toggle-joint will be bent at its bending point 62 (Fig. 3) whereby the breechbloc `2 is pulled back'.y During the return of the breech slide B the fork 71 has been moved v back also in simultaneousl compressing the barrel return `spring 72. Y hissprin serves now for advancing the breech ide B. Shortly beforethe end of the advance of the vbreech slide B, theoblique ed e 69 at the short end 70 ofthe fork 71, wil again force y the-spring-controlledarm 65 into the receiver wall, soA that the 'cam 64 will release the spring-controlledv arm 65, so that the recoil spring 7 3 can again enter in action and y by means ofthe pressure pin 74 acting on the rear toggle" lever l4, ystretch thus the toggle-joint 3', 4, that is tosay lock the breech block 2.

The fork against ,the stop 53 ofthe breech slide B. The released barrel return spring 72 will advance the breech slide B with the barrel 1. The action of the spring-controlled arm 65 on the cam .64, and 'therefore the stretching ofthe toggle-joint and the pulling back of the breech block 2 'depends on the length andV on the shape ofthe cam 64, as Well as on theangular position which the cam 64 has relatively tol the toggle lever 4. As all Vpresses with its front end on the receiver A (see Fig. 17) for the pur pose of limiting the rearward movements of the barrel'l and of the breech slide B. With this object in view the cam or cams 64 are provided 4at the toggle joint 4 with a rear stop surface 64"so that, during the recoil of the barrel and when theV toggle-joint 3, 4 i is stretched, this stop surface strikes against the stop surface A.

In order to load thegun for the irsttime,

the .breech block 2 must be withdrawn, that is to say` the toggle-,joint must be pressed back in opposition tothe action of the clos'- in'g spring 7 3. This is-faeilitated by the device shownin Figs. .8 to 16.

The pinwl 63 for vtherear toggle` lever 4 of "i the toggle joint 3,' 4, is provided ,with a crank 82 with a'handle 81 located in the l5 on the pin 63 of the crank 82.

*t ediby meansy ,of the l the groove 94, as otherwise the sha usava 1 Awallof the breech slide B1 The pini@ is vmounted inthe breech slidelB* and 1s .aflsohprovidedwitha.j hub-83`whichplgs Y "te, cartridge whichl has perhaps atcandboaad;

re or recess 86 ofthe wall o 3"breechfslide- On the hub 83 is mountedv a'v Pilr which offthe front wa j borev 86ofthe front wall of the breechslide has a recess 87' through lwhichthe pin of I roject when the crank turned `backwards (see Fig. 15?.

'Illjlehub 88 of the toggle ever 4 Abasa circular groove 8.9 with astop shoulderv 99,A With the ,said cam face 90 engages a lip 91 v On the crank handle 82 being turned to the ht, the lip 9i which engages with the sto ,sioulder 90, Will'therefore turn the to gle ver 4 to the rightjso that'the saine pulls the ays in a circular. groove 85 operative gositiplnhby h l pro'ection 31W i j en w1t"azgr oove. 9 1xfthe hand lever.

"niorder to enable the handjleverjto ber F3 movedwdownwards in the directiiOIl 0f the- 0 :oneed'ga 95 `of the groove 94'is rounded ofil so, thatfwhen a pressure is exertedxon the hanllefl in the direction of the aforesaidl a WW, the sprin K projection 93 :can be pgsed -back. Ifj ghe togglel lever 4 is now ip 91 of the` pin l which engages with lthe shoulder 90,'that;

is `t'osay if thebreech 'block 2 iswithdrawn, t ,L crank {ian/die A82 can beturned again intoV .Cth ,iinitlfal position, Fig. 8, whereupon a l cavrjtruigg' Capllbe' introduced into the lock chmb'er. r

'it' is desiredr to take the gun to pieces, that is to saQT to pnll the breechV block 1 2 out f the breech Slide B, the pin 6a to, ter with the crank 82must be removed.

can be done only when the crank handie isbro ht into the position shown in Fig..115.` 'llle spring. 92 Ymust be therefore pressed so that its, projection 93 getsouiof e se 96 of the roove 94 14) would prevent the ta ing to pieces of the l In orderto eiiect this the sprin ,92. has a projection 97 projectingA behind t ephandle 5 81 and enabling the spring 92 to be turned back, that is to say said projection 97 is designed to press the projection 93 back into the front wall of the breech slide B. If the crank is now pressed in the direction of the arrow in Fig. 14 into the position in Fig. 15, so that the in 84 of the hub is opposite the recess 87 ofp the front wall of the breech slide B, the crank 82 with the pin 63 can be .withdrawn from the breech slide B, and the i toggle joint 3, 4 will be released.

of the breechslide B; The

breech block;v l"ba'gk.' AThe crank'handle is held in the in-Y a Spring. 92. 4With' a? In order to bringthe-toggle 4levier bucht@ the stretched positionfby means of! the zeranhi handle 82, which may requiredilwhena.

is provided on the-.pin-fvoppositezthelip` said stop consisting ofa pin 98-whichcan 7m' introduced throughfthe button of the handle82 and'projects-down to the planeoA the circular groove 89.. 'Ihispinformsaim--i l. ther stop at the face 990i; the circnlalrzgroosve- S9 of the toggle lever, which isl opposite talles` stop shoulder 90. The pin 98: cani-be ne. moved from the crank- 82, and iinfnormajlll* 'use of lthe gun it must be withdrawnifirom.- the crank 82, sorthat the toggle-joint `miayi work freely.'

We clam- I 1.- A recoiling barrel gun -1 comprising combination a recoilin barrel-, a receives,- a breechfblocle'a breec -slideand aftoiel. joint between the slide and block, a cam on the rear-memberof said "toggle joint, a .springV controlled aria` pivotally mount ed on thev wall of said receiverfor. stopping4 said lateral cam atthe endoftherecellofjthe breech slide so that at-the iiorvmrdl.Inlove-` ment ofthe breech slide thesaid isbentand the breech -blockis-ope ,la bar.4 rel return spring for returning saidbreech'J slide means controlled by said spr-ingto push-l the said spring controlled{am} backto re'- 10B lease the said cam, anda recoil' spring ier;` stretching said toggle. joint 'i to 'clcsl'l thez breech block. .p

2.' A' recoiling barrel n-compris' 1in"L combination a recoiling bguurel', aA reeeiirall breech. block, a breech slide and af toggle joint'between the slide and block-, al lateralV cam on jthe rear member of said' toggle-jp' p a'spring controlled arm pivotallyfinoimte onv the wall of said recelver-crI-stoppinglm l* said: lateral cam at the end of the recoil-of the breech slide so that attheforwardmoves ment of the breech slideI the saidytogglejoint is bentand the breech blockfis opened,y a barrel return springv for returningfsaidflni breech slide, a bifurcated element controlled by said barrelv return spring and` '-1 to; push the said's ring controlledlarm ck?. to ,release the sai cam, aniday recoils 'n for stretching said toggle' joint to close-the 129. breech block, a cam face on said breech slide for bringin the said sp1-in controlled arm into the pat of said cam o the toggle joint.

3. In a recoiling barrel gun with toggle mechanism of thek type described 4having 125K stop-on said pivot pin o posite said lip, a hub on Said rear link y aving `a circular groove and astop shoulder in said circular groove deslg'ned to 'arrest saidremovable 51 Stop, the

crank handle being rotatable to the left so' that the toggle joint is stretched.

54. In a recoiling barrel gun-with toggle meohansmof the type described having ffront and rear links, means for stretching 'the toggle joint by hand comprising a pivot gin on the rear link yengaging with saidl reech slide, a crank handle upon said pivot pin, a. lip on said pivot pin, a removable stop on lsaid pivot Ipin opposite said lip, a hub on said rear link having a circular groove and a l stop shoulder in 'saidfcirculark groovel 'de` signed to arrest said removable stop, the

crank handle being rotatablev tothe left so 5. In a recoiling'barrel gun with toggle lmechanism ofthe type described comprising inicombination ,with the recoiling barrel, a breech slide havinga circulary groove in its .side wall andwith the toggle joint` composed of a front link and of a rear link, a pivot pin on the rear link of the toggle jointengaging A with said-breech slide, ak crank handle ,on

said `pivot pin-having a groove, a hub on the rear link surrounding said pivot pin,- a roove in said hub, a lug on said crank hane engaging with play in the groove of said hub, an end wall for said groove with which saidznosef comes in contact for turning the :rear toggle lever, a hub on vsaid crank, a pin on said ub engaging with the` groove of said breech slide, and a spring controlled lever in said breech slide engaging with the groove of said crank handle retaining said handle in the middle osition. i n

6. In a recolling barrel gun with toggle mechanism of the type described comprising yin combination with the recoiling barrel, a

breech slide having al circular groove in its sidewall and with the toggle joint composed of aifront link and of a rear link, a pivot pin on .the rear link of the toggle joint engingwith said breech slide, a crank hane on'said pivotvpin having a groove, a hub on they rear linksurrounding said pivot pin and a groove in said hub, a lug on said crank handle engaging with play in the groove of 'said hub, an end wall on said groove with which saidv lug comes in contact 'for turning the rear link, a hub on said crank, a pin on saidh'ub engaging Withlthe ,groove of said breech slide, and a spring controlled lever-in said breech slide engaging with the groove of said crank handle-retaining .said handle in the middle position, a rounded edge of the groove of the crank handle fory pushing backsaid s ring controlled lever when the crank hand e is being depressed. and a sharp f edge of the `groove of the crank handle for preventing t e beyond the. deadpoint position.

7. In arecoiling barrel gun with toggle mechanism of the typedescribed comprising in combination with the recoiling barrel, aL

breech slide having a circular groove in its side wall and a recess in said grooveand with the toggle joint composed of a front link and of a rear link, av pivot pin `on the rear link of the toggle joint engaging with said breech slide, a crank handle on said pivot pin having a groove, a hub on the rear linksurrounding said pivot pin, a roove in said hub, a lug on said crank hand e engaging `with play in the groove of said hub, a shoulder on said groove with which said nose comes in cont-act for turning the rear link, a hub on said crank, a pin on said hub en aging `with the groove of said breech sli l e', and a `spring .controlled lever in said breech `slide engaging With they roo-ve of said crank handle retaining said the middle' position, said pin of the hub o the crank handle being adapted to engage with said recess of the groove of the breech slide, a pin traversing said crank handle designed to depress sald spring controlled lerotation of saidcrank handle andle in s ver so that the crank handle can be rotated beyond therdead point position until said pin of the hub stands opposite the recess in the groove of the breech slide.

In testimony whereof we aiiX our signa- FRITZ VALTHER. GEORG WALTHER. Witnesses for Fritz Walther: PAUL 'HAUPnnR,

vHERMANN CAMSPERGER. y Witnesses lfor Georg Walther:

HERMANN Drrznn, RUDOLF RUOKELS.

tures in presence of Witnesses. 

